Hi we are in the process of buying a bungalow but!!?

You cannot move in until the contract is finalised and all of the monies have been transferred, once this happens it is your property and you move in from that point your solicitor will tell you what needs to be done about the sun room and this would normally mean that the present owner needs to get permission verified, or the valuation reduced because the room will have to be removed, or you could take the chance of reducing your offer and try to get permission to keep it yourself and if permission is refused, take it down and start applying for planning permission for a new extension, I assume that the son has no legal right over the property and his mother is now the sole owner, if so, what he wants does not effect the sale, of course, you stand the chance of losing your buyer if the sale takes too long, so you have to either sell and move out, which means putting your furniture into storage, or taking a chance and stay put until it is sorted out, only you can know what option is best for you, I doubt that you will get any help with hotel fees so you need to find a place to stay on a temporary basis such as a short term let on a flat or a cheap bed and breakfast, sometimes it is better to just look for another place to buy rather than go through all of the hassle, this is obviously going to be a stressful time for you, I hope that it all works out fine.